Electric door lock



Sept. 20, 1938. PAPP 2,130,559

ELECTRIC DOOR LOCK Filed Sept. 24, 1937 2 Sheets-Sheet 1 Inventor 4' 2}.4 v

' J ap/7 By in, I- @W M .4 iiorneys Sept. 20, 1938. pp

ELECTRIC DOOR LOCK Filed Sept. 24, 1937 2 Sheets-Sheet 2 InventorPatented Sept. 20, 193$ UNlTED STATES PATIENT OFFICE ELECTRIC DOOR LOCKStephen Papp, Tonawanda, N. Y.

Application September 24, 1937, Serial No. 165,604 1 Claim. (01.292-144)The invention relates to electrically operated door locks or latches,and has particular reference to devices of this character used forlocking the doorsof conveyances such as automobiles and 8 the like; andthe invention together with its objects and advantages will be bestunderstood from a study of the following description taken in connectionwith the accompanying drawings wherein:

Figure 1 is a detail elevational view illustrating the application ofthe invention to an automobile door and with parts of the door brokenaway and shown in sections.

Figure 2 is a transverse sectional view through the door illustratingthe invention.

Figure 3 is a wiring diagram, and Figure 4 is a perspective view of thelockin bolt.

Referring to the drawings by reference numerals it will be seen that inaccordance with the present invention each door 5 of the automobile orother conveyance is provided interiorly of the casing thereof with a.lock casing 6 in which is mounted for sliding movement a bolt I. Bolt 1is provided with a socket l' and a restricted opening 2 whereby toaccommodate one end of a shank 8 and a head 3 on said end of the shank 8in a manner to permit sliding movement of the bolt I longitudinally ofand relafive to the shank 8.

The bolt I is normally urged to a projected position relative to theshank 8 through the medium of a coil-spring l0 disposed about the shank8 and at one end impinging against the inner end of the bolt I, and at arelatively opposite end impinging against a fixed collar 9 on the shank8.

Spring Ill normally urges the bolt I to a pro- Jected position forengagement with the keeper 0 ll fixedly secured to the door casing l2,in any suitable manner. It will thus be seen that when the door isswung. to a closed position bolt 1 will, against the action of springIt, slide inwardly relativeto the shank 8 to permit the door to move toa fully closed position whereupon spring III will then act on the bolt Ito project the latter into engagement with the keeper H to therebysecure the door in closed position.

A toggle link l3, I3 is pivoted at one end thereof as at ll within thecasing of the door 5 and at a relatively opposite end thereof ispivotally connected with the free end of the shank 8 or bolt 1 as at l5.

Also suitably mounted with the casing of the door 5 is an electromagnetI6. I

Working through a suitable guide I! provided therefor and insubstantialalignment with the magnet I6 is a rod l8 about which is disposed a coilspring l9, one end of which spring bears against the guide I! and theother end of which 5 spring impinges against a fixed collar 20 on therod i8. At the upper end thereof the rod 18 is pivoted to the link l3,l3 as at pivot 2| of said toggle link.

0n the lower end of the rod l8 and comple l0 mental to the magnet Hi'isan armature 22.

From the above it will be seen that normally the bolt 1 is in aprojected position. Manifestly when the magnet 16 is excited armature 22thereof will be attracted by the magnet causing the 1 rod ill to movedownwardly against the action of spring l9. This will result in avertical downward swinging movement of the link l3, 13' so that the bolt1 in opposition to spring I9 will be retracted, thus the door isunlocked and is held in 20 such unlocked position as long as the magnetI6 is energized or excited. Also for each door there is provided for controlling the circuit through the magnet IS a push button or othersuitable type of electric switch 25 23 accessible from the outer side ofthe door whereby the door may be unlocked from the outside of thevehicle. Also for unlocking from the interior of the vehicle there isprovided an electrical switch 24 that is mounted on the in- 30 ner sideof the door and this switch 24 .is also arranged in circuit with themagnet l6, switches 23, 24 and magnet l6 being arranged in a batterycircuit as shown in Fig. 3, the battery, or source of electrical supply,being indicated by 35 the letter B. Also arranged in the circuit asshown in Fig. 3

is a master switch S which may be suitably mounted in the automobile atany suitable and convenient location, and manifestly switch S 4-.) mustbe closed before the electrical feature of the lock will function.

It will be readily apparent that each of the several doors of theautomobile or other conveyance may be similarly equipped, and with 45the doors so equipped, each door when locked may be unlockedindependently of the other door, and from either the interior orexterior of the automobile.

It is thought that a clear understanding of 50 An electric door lockcomprising a casing when the door occupies a closed position, a boltslidable in said casing and having one end shaped to coact with thekeeper to secure the door closed and provided in the opposite endthereof with a socket having a. restricted mouth, a shank having one endpositioned within the socket by way of the restricted mouth and freelyslidable within the latter, a headon said end of the shank and lying inthe socket and engageabie with walls of the restricted mouth to preventseparation of the shank and the bolt and permitting the latter to have alimited sliding movement on the shank when moving over the keeper duringthe door moving into closed position, a coil spring on said shank andacting on the bolt to position the latter to bring the head inengagement with the walls of the restricted mouth, a toggle conmountedwithin a door and opening outwardly of one edge of said door andadjacent to its keeper struction including pivotally connected linksections and one 01' said sections pivoted on the other end 01' theshank and the other link sections pivoted on the door, 9. depending rodhaving the upper end thereof pivotally connected on the pivotallyconnected ends of the link sections and slidably mounted on the door, anelectric means acting on said rod to slide the latter downwardly forswinging the pivotally connected ends of the link sections downwardlyand thereby slide the bolt away from the keeper, and a spring acting onsaid rod to urge the latter vertically for positioning the link sectionsinto a plane common to both and thereby permitting the first-namedspring to urge the bolt into position to engage.

with the keeper on the door moving into closed position.

STEPHEN PAPP.

